SAN JOSE, Calif. – June 26, 2019 – The Video Electronics Standards Association (VESA®) today announced that it has released version 2.0 of the DisplayPort™ (DP) audio/video standard.
DP 2.0 is backward compatible with previous versions of DisplayPort and incorporates all of the key features of DP 1.4a, including support for visually lossless Display Stream Compression (DSC) with Forward Error Correction (FEC), HDR metadata transport, and other advanced features.
Realistically to get past DSC and get a good quality image, DisplayPort needs to increase the bandwidth significantly. DisplayPort 1.4 is 25.92 gigabit which is fine for 4K UHD with HDR at up to 75 Hz. To reach 7680×4320 HDR will need more than the DisplayPort 2.0 77.37 gigabit speed. About 100 gigabit speeds is more realistic. 7680×4320 HDR at 144 Hz is so demanding that 250 gigabit speeds will be needed.
DP 2.0 is the first major update to the DisplayPort standard since March 2016, and provides up to a 3X increase in data bandwidth performance compared to the previous version of DisplayPort (DP 1.4a), as well as new capabilities to address the future performance requirements of traditional displays.
These include beyond 8K resolutions, higher refresh rates and high dynamic range (HDR) support at higher resolutions, improved support for multiple display configurations, as well as improved user experience with augmented/virtual reality (AR/VR) displays, including support for 4K-and-beyond VR resolutions.
The move to working with USB type-C is the DisplayPort alt-mode which is designed as an alternative to the existing standard and mini cables. The recently announced USB 4.0 will be able to reach 40 gigabit speeds which is still a struggle for extremely high resolution displays.
DisplayPort 1.4 has been the choice for 4K panels like the LG 27UL500 panel which supports HDR10 in addition to 3840×2160 native resolution. Now with DisplayPort 2.0 the path to 8K with high refresh rates in addition to HDR and 4:4:4 chrominance.
The Dell UP3218K with dual DP 1.4 cables still does not have enough bandwidth to come anywhere close to what is needed. DP 1.4 can do 3840×2160 HDR at about 75 Hz maximum. 7680×4320 needs double the bandwidth of dual DP 1.4 cables to achieve a native HDR image. The need to use a compressed data stream is the only way the UP3218K can get around the problem. Even DP 2.0 is not quite adequate for 7680×4320 HDR, it is about 25% below the bandwidth needed to eliminate the DSC completely.
Industry efforts are underway to push video broadcasting beyond 4K/Ultra HD resolutions, while 8K (7680×4320) televisions and PC monitors are already beginning to hit the market. For example, NHK (Japan) has announced they intend to broadcast the 2020 Summer Olympics in 8K, and has already begun to broadcast 8K content to viewers.
DisplayPort 2.0 also supports 15360×8460 at 60 Hz so moving to 16K is now possible. It’s likely going to be a few years before 16K panels become more affordable. The Innolux 100 inch 16K S-UHD Display module exhibits the best for human vision ever but its brutally expensive.